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coolant light comes on when accelerating on the hwy and then goes away???

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Old 11-30-2009, 05:06 PM
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coolant light comes on when accelerating on the hwy and then goes away???

So after the coolant flush and everything, now another issue. When im driving on the highway, the coolant light will come on and stay on for a few minutes and then go away, sometimes when I brake or slow down it goes away too. I check the coolant and its fine. Thoughts?
Old 11-30-2009, 05:08 PM
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coolant level sensor is going bad
replace or just remember to check it once in awhile.
Old 11-30-2009, 05:11 PM
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common problem? Is the coolant sensor a common issue?
Old 11-30-2009, 05:16 PM
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quite common, mine was starting to go bad also

try adding a bit of distilled water in the overflow tank. might cure it temporarily.
Old 11-30-2009, 05:20 PM
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how much for the part? i cant find it on ebay, just coolant temp sensor, also, should the reservoir be filled to the top?
Old 11-30-2009, 05:25 PM
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http://www.mazmart.com/ItemDetail.aspx?id=531

no, not to the top. there are high and low levels indicated on the side of the overflow tank
Old 11-30-2009, 06:32 PM
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Originally Posted by Vikingdiesel
how much for the part? i cant find it on ebay, just coolant temp sensor, also, should the reservoir be filled to the top?


If it gets near the low level it will light up. Check it when it is cold in the morn. Add enough to get it near the full mark and if it comes on again then you will need a new tank.
Old 11-30-2009, 07:24 PM
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Originally Posted by cjkim
http://www.mazmart.com/ItemDetail.aspx?id=531

no, not to the top. there are high and low levels indicated on the side of the overflow tank
ohh so I pretty much need a whole new reservoir since I cant but the sensor by itself?
Old 11-30-2009, 08:00 PM
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Yep, the whole unit.

Last edited by CarAndDriver; 11-30-2009 at 08:03 PM.
Old 11-30-2009, 08:10 PM
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surprised noone has said search lol ... i just disconnected mine and monitor the coolant when i check my oil
Old 11-30-2009, 10:20 PM
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I just overfill mine and that takes care of it.
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